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You need to complete the following task:

Come up with a possible explanation for why senior citizens are so affected by COVID-19


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Senior citizens are particularly vulnerable to complications from COVID-19 due to their weakened immune systems and underlying health conditions. Additionally, due to age-related factors, their respiratory and cardiovascular systems may be less able to handle the stresses of infection and recovery. Additionally, many senior citizens are living in long-term care facilities, which can facilitate the spread of the virus.